From: a.paterniani@swapp-eng•it (Andrea Paterniani)
To: linux-arm-kernel@lists•infradead.org
Subject: [patch 0/2] ARM: Disable outer cache before kexec call -V3
Date: Wed, 04 Aug 2010 08:46:21 +0200 [thread overview]
Message-ID: <4C590CBD.1080305@swapp-eng.it> (raw)
In-Reply-To: <5A47E75E594F054BAF48C5E4FC4B92AB0321623966@dbde02.ent.ti.com>
Il 03/08/2010 19.36, Gadiyar, Anand ha scritto:
> Andrea Paterniani wrote:
>
>> Hi,
>> I have applied your patches to kernel 2.6.35-rc4 running on my beagleboard.
>> I'm using kexec-tools-2.0.1.
>>
>> My u-boot bootargs is:
>> console=ttyS2,115200n8 root=/dev/mmcblk0p2 rw rootfstype=ext3 rootwait ip=192.168.2.13::255.255.255.0
>>
>> To restart the system I type:
>> > sync
>> > kexec -l /boot/zImage --append="console=ttyS2,115200n8 root=/dev/mmcblk0p2 rw rootfstype=ext3 rootwait ip=192.168.2.13::255.255.255.0"
>> > kexec -e
>>
>> Not every time the system restart.
>> In some cases no output on the console after the following:
>> Bye!
>> Uncompressing Linux... done, booting the kernel.
>>
>> Any idea?
>>
>>
> Can you try building your kernel with CONFIG_EARLY_PRINTK,
> and add the word "earlyprintk" to your bootargs?
>
>
How to enable EARLY_PRINTK for ARM architecture?
Browsing kernel source I find arch/arm/kernel/early_printk.c but no way
to enable CONFIG_EARLY_PRINTK from make menuconfig.
Is there any patch to have this config option for ARM?
- Andrea
>
>
>> Il 05/07/2010 13.52, Thomas Gleixner ha scritto:
>>
>>> The following patch series addresses the problem that the kexec code
>>> does not disable the outer cache before disabling the inner cache and
>>> jumping into the new kernel. This results in random crashes of the new
>>> kernel.
>>>
>>> Changes since version 2:
>>>
>>> - Use CLEAN_INV_WAY in l2x0_flush_all according to Catalin
>>>
>>> - Rename outer_cache_disable() to outer_disable()
>>>
>>> - Added a BUG_ON() when l2x0_inv_all() is called with L2 enabled.
>>>
>>> Thanks,
>>>
>>> tglx
>>>
>>>
>>>
>>>
>
--
next prev parent reply other threads:[~2010-08-04 6:46 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-05 11:52 [patch 0/2] ARM: Disable outer cache before kexec call -V3 Thomas Gleixner
2010-07-05 11:52 ` [patch 1/2] arm: Disable outer (L2) cache in kexec Thomas Gleixner
2010-07-05 12:11 ` Catalin Marinas
2010-07-05 11:52 ` [patch 2/2] arm: Implement l2x0 cache disable functions Thomas Gleixner
2010-07-05 12:13 ` Catalin Marinas
2010-08-03 12:44 ` Linus Walleij
2010-08-03 14:20 ` [patch 0/2] ARM: Disable outer cache before kexec call -V3 Andrea Paterniani
2010-08-03 17:36 ` Gadiyar, Anand
2010-08-04 6:46 ` Andrea Paterniani [this message]
2010-08-04 6:50 ` Shilimkar, Santosh
2010-08-04 7:00 ` Baruch Siach
2010-08-04 9:19 ` Andrea Paterniani
2010-08-06 6:16 ` Andrea Paterniani
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